pack invalid operations

[spyworld]

After upgrade to PHP 7.1, I receive an error message:

 

Constant expression contains invalid operations

pack("c*", 56, 94, 129, 23, 143, 52, 187, 82);

[requinix]

You cannot define a constant using const with an expression (such as a function call). Use define for a global constant or find another way to do what you want for a class constant.